CN107861079B - Method for local coil localization, magnetic resonance system and computer-readable storage medium - Google Patents
Method for local coil localization, magnetic resonance system and computer-readable storage medium Download PDFInfo
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Abstract
The invention relates to a method, a magnetic resonance system and a computer-readable storage medium for local coil localization, the method comprising: acquiring first position information based on relative position information between a local coil and an imaging space of a magnetic resonance system; displaying a mark representing the local coil on an operation interface according to the first position information; receiving the mark selected on the operation interface; and moving the local coil corresponding to the selected mark into the imaging space. According to the invention, the distance between the local coil and the imaging space is acquired, so that the local coil is moved into the imaging space, the precision is greatly improved, the mark corresponding to the local coil can be displayed on the operation interface, and a user can select the mark through the operation interface to realize automatic subsequent operation of the magnetic resonance system, thereby greatly reducing the operation time, reducing the requirements on the related operation experience of a technician, and avoiding the visual impairment of a patient and the technician.
Description
Technical Field
The present invention relates to the field of magnetic resonance technology, and in particular, to a local coil positioning method, a magnetic resonance system, and a computer-readable storage medium.
Background
With the increasing medical level, Magnetic Resonance Imaging (MRI) is increasingly used in clinical diagnosis as a kind of biomagnetic nuclear spin Imaging technology. In the magnetic resonance imaging, hydrogen nuclei (namely H +) precessing in human tissues generate radio frequency signals by utilizing a magnetic field and radio frequency pulses, namely, a human body can be irradiated by utilizing proper electromagnetic waves to enable the internal tissues of the human body to generate resonance, and then the received electromagnetic waves released by the tissues are analyzed, so that accurate three-dimensional images in the human body can be drawn.
In the current magnetic resonance imaging technology, a local coil fixed to a human body part is generally provided to receive a magnetic resonance signal, and a need for positioning the local coil arises in order to perform magnetic resonance imaging of a desired part.
The traditional method for positioning the local coil adopts a laser lamp for positioning, but the accurate positioning of the coil is ensured by manual control and monitoring of a patient bed by an operator, so that the positioning precision is poor, excessive time and energy of the operator are required in the whole positioning process, and the technician is required to have related operation experience, so that the inspection cost is overhigh. In addition, laser lights can potentially damage the vision of the patient or technician.
Disclosure of Invention
In view of the above, it is necessary to provide a local coil positioning method, a magnetic resonance system and a computer-readable storage medium for solving the problem of excessive examination cost.
A method of local coil localization for use in a magnetic resonance system, comprising:
acquiring first position information based on relative position information between a local coil and an imaging space of a magnetic resonance system;
displaying a mark representing the local coil on an operation interface according to the first position information;
receiving the mark selected on the operation interface;
and moving the local coil corresponding to the selected mark into the imaging space according to the first position information.
In one embodiment, the acquiring first position information based on relative position information between the local coil and a magnet center imaging space in the magnetic resonance system includes:
calculating the first position information by using a positioning signal transmitted by a first positioning device and received by a second positioning device;
the first positioning device is arranged on the local coil, the local coil is fixedly arranged on a part to be scanned of an imaging object, and the imaging object is fixedly arranged on a patient bed of the magnetic resonance system.
In one embodiment, the second positioning device comprises a processing unit pre-stored with second position information being relative position information between the patient bed and the imaging volume and third position information being relative position information between the patient bed and the second positioning device; the calculating the first position information by using the positioning signal transmitted by the first positioning device and received by the second positioning device includes:
acquiring the relative distance between the first positioning device and the second positioning device, and calculating fourth position information according to the third position information; the fourth position information is position information of the local coil on the patient bed;
and calculating the first position information according to the second position information and the fourth position information.
In one embodiment, the receiving selects the mark on the operation interface to receive a plurality of marks; moving the local coil corresponding to the selected marker into the imaging space according to the first position information, including:
and sequentially moving the local coil corresponding to each selected mark into the imaging space according to the first position information and a set scanning sequence.
In one embodiment, the set scanning order is an order of selecting a plurality of the marks on the operation interface.
In one embodiment, the method further comprises:
generating a scanning sequence according to a preset mode, and displaying the scanning sequence on the operation interface;
acquiring a selected scanning sequence;
and sequentially moving the corresponding local coils to the imaging space according to the selected scanning sequence.
In one embodiment, the method further comprises:
obtaining a ranking of the selected plurality of the markers;
and sequentially moving the corresponding local coils to the imaging space according to the sequence.
In one embodiment, the set scanning order is a priority order of scanning operations performed by the local coils.
A magnetic resonance system comprising:
a scanning apparatus comprising a main magnet and a patient couch, the main magnet for generating a main magnetic field;
a local coil movable with the patient bed;
the first positioning device is fixedly arranged on the local coil;
the second positioning device is matched with the first positioning device to acquire first position information between the local coil and an imaging space in the main magnetic field;
the main control device is connected with the second positioning device and used for generating a mark of the local coil according to the first position information;
the display device is connected with the main control device and is used for displaying the mark;
the selection device is connected with the display device and is used for selecting the mark displayed by the display device;
wherein the main control device controls the patient bed to move according to the mark selected by the selection device on the display device so as to move the local coil corresponding to the mark to the imaging space.
A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the above-mentioned steps of the method of local coil localization.
According to the local coil positioning method, the magnetic resonance system and the computer readable storage medium, the distance between the local coil and the imaging space is acquired, so that the local coil is moved into the imaging space, the precision is greatly improved, the mark corresponding to the local coil can be displayed on the operation interface, and a user can select the mark through the operation interface to realize automatic subsequent operation of the magnetic resonance system, so that the operation time is greatly reduced, the requirements on related operation experience of a technician are reduced, and the visual impairment of a patient and the technician is avoided.
Drawings
FIG. 1 is a flow diagram illustrating a method for local coil positioning in one embodiment;
FIG. 2 is a diagram of an exemplary MR system;
FIG. 3 is a diagram illustrating a manner in which first location information is computed according to an embodiment;
FIG. 4 is a diagram illustrating an exemplary operating interface;
FIG. 5 is a schematic view of an operation interface in another embodiment;
figure 6 is a schematic structural diagram of a magnetic resonance system in another embodiment;
FIG. 7 is a flow chart illustrating a method of local coil positioning in another embodiment;
fig. 8 is a schematic diagram illustrating a calculation method of the first location information in another embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
FIG. 1 is a flow diagram of a method of local coil positioning in one embodiment. As shown in fig. 1, a local coil positioning method may include the steps of:
step S102: first position information is acquired based on relative position information between the local coil and an imaging volume of the magnetic resonance system.
In particular, in order to be able to move the local coil to the imaging space in the magnetic resonance system, first position information needs to be acquired; the first position information may comprise distance values between the local coil and an imaging space in the magnetic resonance system, coordinate information with respect to the same reference, etc. In one embodiment, in a magnetic resonance system using a linear track, the first position information may also refer to a distance value between the local coil and the imaging space, since the patient bed drives the patient bound with the local coil to perform a back-and-forth linear motion along the linear track. The imaging space is a space where the magnetic resonance system scans and images a patient, and is generally a space where a main magnetic field in the magnetic resonance system is relatively uniform.
Step S104: and displaying a mark representing the local coil on an operation interface according to the first position information.
Specifically, based on the first position information, displaying a mark corresponding to the local coil on an operation interface, where the mark may be used to refer to the local coil; meanwhile, data information related to the local coil, such as the first position information, may also be included, for example, a coil code capable of uniquely identifying the current coil may be included in the first position information.
Step S106: receiving the mark selected on the operation interface.
Specifically, the user selects the displayed marker through the operation interface, and the marker enters the selected state, namely the local coil corresponding to the marker is regarded as being in the selected state.
Step S108: and moving the local coil corresponding to the selected mark into an imaging space.
Specifically, when the local coil corresponding to the marker is selected, the magnetic resonance system moves the local coil into the scanning area of the magnetic resonance system, and the moving distance is the distance between the local coil and the imaging space included in the first position information.
According to the coil positioning method and the magnetic resonance system, the local coil is moved to the imaging space by acquiring the accurate distance between the local coil and the imaging space, so that the precision is greatly improved, the mark corresponding to the local coil can be displayed on the operation interface, and a user can select the mark through the operation interface to realize the automatic subsequent operation of the magnetic resonance system, so that the operation time is greatly reduced, and the requirements on the related operation experience of a technician are reduced.
Fig. 2 is a schematic structural diagram of an embodiment of a magnetic resonance system. As shown in fig. 2, in one embodiment, a magnetic resonance system 200 includes a scanning device 201, a local coil 202, a first positioning device 203, a second positioning device 204, a master device 205, a display device 206, and a selection device 207. Wherein the scanning apparatus 201 comprises a main magnet 211 and a patient bed 221, the main magnet 211 being adapted to generate a main magnetic field, the patient bed 221 being adapted to hold and carry the imaging subject 300; the local coil 202 is fixed on a part to be scanned of the body of the imaging object 300 and is used for scanning the part to be scanned in cooperation with the scanning device 201; the first positioning device 203 is arranged on the local coil 202; the second positioning device 204 is disposed on the patient bed 221, and it should be noted that, in some embodiments, the second positioning device may also be fixedly disposed at another place, such as the ground, as long as the position of the second positioning device is fixed; the first positioning device 203 and the second positioning device 204 cooperate to acquire first position information between the local coil 202 and the imaging space of the main magnet 211; the main control device 205 is connected to the first positioning device 203 and the second positioning device 204, respectively, and is configured to generate a mark of the local coil 202 according to the first position information; the display device 206 is connected with the main control device 205 and is used for displaying the mark of the local coil 202, and the mark corresponds to the local coil 202; the selection device 207 is connected with the display device 206 and is used for selecting the marks displayed by the display device 206; further, the main control device 205 controls the patient bed 221 to move according to the mark selected by the selection device 207 on the display device 206, so as to move the local coil 202 corresponding to the mark to the imaging space.
For the magnetic resonance system shown in fig. 2, the above-mentioned local coil positioning method:
step S102: first position information is calculated based on relative position information between the local coil and a magnet central imaging space in the magnetic resonance system.
Specifically, as shown in fig. 2, a first positioning device 203 is mounted on the local coil 202, and a second positioning device 204 is mounted on the patient bed 221; the first positioning device 203 cooperates with the second positioning device 204 to acquire first position information, i.e. the distance of the local coil from the imaging volume. In this embodiment, the first positioning device 203 is a signal transmitter, the second positioning device 204 is a signal receiver, and the main control device 205 sends a start instruction to the signal receiver and the signal transmitter, so that the signal transmitter transmits a signal to the signal receiver; according to the signal received by the signal receiver, the main control device 205 calculates the distance information between the local coil 202 and the imaging space. It should be noted that the first positioning device may also be a signal receiver, and in this case, the second positioning device is a signal transmitter.
Step S104: and displaying a mark representing the local coil on an operation interface.
Specifically, as shown in fig. 2, after the main control device 205 calculates the distance information between the local coil 202 and the imaging space, the first position information is used to obtain the coil code a corresponding to the local coil 202, that is, the local coil 202 and the distance information can be associated, so as to correspondingly generate a mark a corresponding to the coil code a, and the mark is displayed on the display device 206 connected to the main control device 205.
Step S106: receiving the mark selected on the operation interface.
Specifically, the user may select a marker a on the display device 206 connected to the selection device 207 through the selection device 207, and the local coil 202 corresponding to the marker a is regarded as the selected state after the display device 206 receives the selection.
Step S108: and moving the local coil corresponding to the selected mark into an imaging space according to the first position information.
Specifically, when the local coil 202 corresponding to the marker a is selected, the magnetic resonance system 200 controls the patient bed 221 to move towards the inside of the main magnet 211, and drives the local coil 202 to move towards the imaging space, where the moving distance is the distance between the local coil and the imaging space.
In one embodiment, the second positioning device comprises a processing unit pre-stored with second position information being relative position information between the patient bed and the imaging space and third position information being relative position information between the patient bed and the second positioning device; the acquiring of the first position information in step S102 includes:
acquiring the relative distance between the first positioning device and the second positioning device, and calculating fourth position information according to the third position information; the fourth position information is position information of the local coil on the patient bed; and calculating the first position information according to the second position information and the fourth position information.
Specifically, a processing unit (not shown in the figure) is provided on the second positioning device 204, in which second position information including the distance between the patient bed 221 and the imaging space and third position information including the distance between the patient bed 221 and the second positioning device 204 are prestored. In this embodiment, the first positioning device 203 is an ultrasonic signal transmitter, and the second positioning device 204 is an ultrasonic signal receiver, as shown in fig. 3, the ultrasonic signal transmitter on the local coil 202 transmits an ultrasonic signal and is received by the ultrasonic signal receiver, and the distance between the ultrasonic signal transmitter and the ultrasonic signal receiver can be calculated by the time and the wave speed of receiving the ultrasonic signal. The main control device 205 obtains the third position information, that is, the distance between the patient bed 221 and the ultrasonic signal receiver, which is pre-stored by the processing unit disposed on the ultrasonic signal receiver, and adds the distance between the patient bed 221 and the ultrasonic signal receiver to the distance between the ultrasonic signal transmitter and the ultrasonic signal receiver to obtain the fourth position information, that is, the distance between the local coil 221 and the patient bed 221. The main control device 205 subtracts the distance between the local coil 202 and the patient bed 221 from the distance between the imaging space and the patient bed 221 to obtain the first position information, i.e., the distance between the imaging space and the local coil 202, according to the second position information and the fourth position information obtained by calculation, which are pre-stored by the processing unit disposed on the ultrasound signal receiver. It should be noted that, in this embodiment, the first positioning device and the second positioning device are taken as ultrasonic distance measuring devices for example, and in other alternative embodiments, the first positioning device and the second positioning device may also be optical distance measuring devices such as infrared rays or electromagnetic distance measuring devices such as bluetooth, NFC, Wi-Fi.
Through setting up first positioner, second positioner and processing apparatus, local coil can obtain the accurate positioning, and has saved the laser lamp that traditional local coil's positioning method needs used to save the step that lets the patient close the eye, also avoided the unexpected injury that the laser lamp probably caused the patient.
In one embodiment, receiving the marker selected on the operation interface as receiving a plurality of markers, and moving the local coil corresponding to the selected marker into the imaging space according to the first position information in step S108 includes: and sequentially moving the coil of each selected local coil into the imaging space according to the set scanning sequence according to the first position information.
As shown in fig. 3, a plurality of coil codes may be stored in the main control device 205, each local coil may correspond to one coil code, and information received and transmitted by the magnetic resonance system may include coil codes, so that the magnetic resonance system can automatically identify or determine the corresponding local coil based on the coil codes in the received information, so as to automatically implement operations such as selection or control of the local coil in the subsequent scanning process.
Specifically, when a plurality of local coils (not shown) are fixed on the imaging object 300, each local coil corresponds to a unique mark displayed on the display device; for example, a local coil A, B, C (not shown) is fixed on the imaging subject 300, and the local coil A, B, C sequentially corresponds to the coil code A, B, C, and as shown in fig. 4, a mark A, B, C is correspondingly displayed on the display device 206, that is, the local coil a corresponds to the mark a, the local coil B corresponds to the mark B, and the local coil C corresponds to the mark C; when a mark A is selected on the display device 206 through the selection device 207, a coil selection instruction containing a coil code A is triggered, the magnetic resonance system corresponds to the selected local coil A based on the coil code A in the received selection instruction, namely the local coil A is regarded as a selected state, and meanwhile, the mark A on the display device is also in the selected state; at this time, the operator may further continue to select the marker B, and in the same way, the local coil B corresponding to the marker B is regarded as the selected state. Subsequently, if only the marker a is selected, after an instruction to start scanning is triggered, the magnetic resonance system 200 moves the local coil a corresponding to the marker a to the imaging space, and performs a scanning operation on the to-be-scanned portion of the imaging object 300, and if the markers a and B are selected, the magnetic resonance system 200 may first move the local coil a corresponding to the marker a to the imaging space, and after the scanning operation on the portion of the imaging object 300 corresponding to the local coil a is completed, move the local coil B corresponding to the marker B to the imaging space, and perform the scanning operation on the portion of the imaging object 300 corresponding to the local coil B.
In an embodiment, the magnetic resonance system can also be arranged to move each selected local coil into the imaging volume in the order of priority of the scanning operation of the local coil.
Specifically, after the selection device 207 selects the marker A, B, the main control device 205 acquires the distance between the local coil corresponding to the marker a and the imaging space and the distance between the local coil corresponding to the marker B and the imaging space, and performs the scanning operation in the order of the distances from small to large. It should be noted that the priority order of the local coils for performing the scanning operation may be defined by the user, for example, the distance between the selected local coil and the imaging space may be obtained by the main control device, and the scanning operation may be performed according to the order of the distances from large to small.
In one embodiment, the master device 205 automatically generates one or more scan sequences in a predetermined manner, and displays the scan sequences on the display device 206 in an image manner, referring to fig. 5, in this embodiment, the master device 205 generates the scan sequences of "A, B, C" and "C, B, A". When the user selects the sequence "A, B, C" and clicks the start button, the magnetic resonance system 200 sequentially moves the local coils corresponding to the marker a, the marker B, and the marker C to the imaging space to perform the scanning operation.
As shown in fig. 6, in a specific embodiment, a magnetic resonance system 500 includes a scanning device 501, a local coil 502, an ultrasonic signal transmitter 503, an ultrasonic signal receiver 504, a main control device 505, a display device 506, and a selection device 507.
The scanning device 501 comprises a main magnet 511 and a patient bed 521. The main magnet 511 may be formed of superconducting coils for generating a main magnetic field, and in some cases, may also be a permanent magnet. The main magnet 511 may be used to generate main magnetic field strengths of 0.2 tesla, 0.5 tesla, 1.0 tesla, 1.5 tesla, 3.0 tesla, or higher. It should be noted that the operator can adjust the main magnetic field strength by himself or herself according to the need, and is not limited to the various magnetic field strength values described in this embodiment. In magnetic resonance imaging, the imaging subject 600 is carried by a patient bed 521, and the local coil 502 is disposed on a portion to be scanned of the imaging subject 600, and moves the imaging subject 600 into a scanning region (not shown in the figure) where the magnetic field distribution of the main magnetic field is uniform along with the movement of the patient bed 521.
An ultrasonic signal emitting device 503 is disposed on the local coil 502; the ultrasonic signal receiving device 504 is arranged on the patient bed 521; the ultrasonic signal emitting device 503 and the ultrasonic signal receiving device 504 cooperate to obtain the distance between the local coil 502 and the imaging space of the main magnet 511.
The main control device 505 is respectively connected with the ultrasonic signal transmitting device 503 and the ultrasonic signal receiving device 504, and is configured to generate a marker a of the local coil 502 according to a distance between the local coil 502 and the imaging space of the main magnet 511; the main control unit 505 includes a combinational logic controller, a micro-program controller, or a CPU. Illustratively, the Controller 505 may include a CPU that controls components or units to work in coordination according to the functional requirements of the instructions, and the CPU may include an Instruction Register (IR), a Program Counter (PC), an Operation Controller (OC), and the like.
The display device 506 is connected with the main control device 505 and is used for displaying the mark A of the local coil 502; the types of the Display device include a Cathode Ray Tube (CRT) Display, a Liquid Crystal Display (LCD), an Organic Light-Emitting Display (OLED), a plasma Display, and the like, and the user can select the type according to actual needs.
The selection device 507 is connected with the display device 506 and is used for selecting the mark A displayed by the display device 506; the selection means 507 includes a mouse and a keyboard, and a user can input information such as physiological information of the subject, a target imaging portion, and scanning parameters through the mouse or the keyboard.
As shown in fig. 7, for the magnetic resonance system 500 in the above embodiment, in one embodiment, a method of local coil positioning specifically includes the following steps:
step S602: and recording the registration information of the imaging object, generating a DICOM file and storing the DICOM file in the magnetic resonance system.
Specifically, the Imaging subject 600 may be a patient, or a device tester, and the like, a physical examination is performed before the MR scanning is performed on the Imaging subject 600, various physiological parameters are examined, it is determined that the Imaging subject 600 may perform the MR scanning, a portion of the Imaging subject 600 that needs to perform the magnetic resonance scanning is determined, registration information is entered through a selection device, and a Digital Imaging and Communications in medicine (DICOM) file storing the registration information of the Imaging subject 600 is generated, where the DICOM file includes information of the portion of the Imaging subject 600 that needs to be scanned, where the portion that needs to be scanned may be one or multiple, for example, the portion of the Imaging subject to be scanned in this embodiment is a thoracic cavity.
Step S604: the imaging subject and the local coil are fixed at specified positions on the patient bed.
Specifically, the imaging subject 600 is fixed on a designated position of the patient bed 521, the local coil 502 is fixed on the body of the imaging subject 600, and the local coil 502 may be fixed on the head, the trunk, the limbs, and the like of the imaging subject 600, specifically according to the part to be scanned of the imaging subject 600; for example, in this embodiment, the local coil 502 may be fixed on the chest of the imaging subject 600, and if the imaging subject 600 needs to scan a plurality of portions, the local coils of a plurality of corresponding portions may be fixed at the same time. The imaging subject 600 and the local coil 502 should be securely fixed to the patient table 521 and not subject to displacement during scanning, and the imaging subject 600 should be kept in mind that no metal objects can be carried on the examination subject prior to performing the magnetic resonance scan.
Step S606: and sending a scanning starting instruction to acquire a local coil mark.
Specifically, as shown in fig. 8, after the user sends an instruction to start scanning through the selection device 507, the ultrasound signal transmitter 503 sends an ultrasound signal, the ultrasound signal receiver 504 receives the ultrasound signal, and records the time when the ultrasound signal is received, the main control device 505 calculates the distance h between the ultrasound signal transmitter 503 and the ultrasound signal receiver 504, that is, the distance h between the local coil 502 and the ultrasound signal receiver 504, that is, h △ t c, according to the time difference △ t between the ultrasound signal sent by the ultrasound signal transmitter 503 and the ultrasound signal received by the ultrasound signal receiver 504, and the wave speed c, in this embodiment, the calculated value of h may be set to 1 meter, further, the main control device 505 acquires the distance information d3 between the ultrasound signal receiver 504 and the patient bed 521, which is pre-stored by a processing unit (not shown in the figure) provided on the ultrasound signal receiver 504, in this embodiment, d3 is 0.5 meter, the main control device 505 adds h to d3, obtains the distance d 7 between the local coil 502 and the patient bed 521 as 1.5 meter, that d 7 is the local coil 19 m + 7 meter, m + 7 meter is further calculated by the main control device 19, m + 7 meter, m + 19 m + 3 is further calculated by the main control device 502, and m + 3, which is displayed by the imaging device 19, which is further displayed by the main control device 19, and m + 3, which is displayed by the imaging device 19, and m + 3 which is displayed by the imaging device 19.
Step S608: and selecting the mark and starting to perform a scanning operation on the imaging object.
Specifically, by selecting the mark a on the display device 506 through the selection device 507, the patient bed 521 carries the imaging subject 600 and the local coil 502 and automatically raises the position suitable for performing the magnetic resonance scanning, and moves the imaging subject 600 and the local coil 502 toward the imaging space by 1.5 meters to reach the specified scanning position, and the magnetic resonance system 600 starts the scanning operation on the part to be scanned of the imaging subject 600 where the local coil 502 is located.
The embodiment of the invention also provides a computer readable storage medium. A computer-readable storage medium, on which a computer program is stored which, when executed by a processor, carries out the steps of:
calculating to obtain first position information based on relative position information between the local coil and a magnet central imaging space in a magnetic resonance system;
displaying a mark representing the local coil on an operation interface;
receiving the mark selected on the operation interface;
and moving the local coil corresponding to the selected mark into the imaging space according to the first position information.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a non-volatile computer-readable storage medium, and can include the processes of the embodiments of the methods described above when the program is executed. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), or the like.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method of local coil localization for use in a magnetic resonance system, comprising:
acquiring first position information based on relative position information between a local coil and an imaging space of a magnetic resonance system, wherein the first position information comprises a distance value between the local coil and the imaging space in the magnetic resonance system or coordinate information of the local coil and the magnetic resonance imaging space relative to the same reference object;
displaying a mark representing the local coil on an operation interface according to the first position information;
receiving the mark selected on the operation interface;
and moving the local coil corresponding to the selected mark into the imaging space.
2. The method of claim 1, wherein the obtaining first position information based on relative position information between the local coil and an imaging volume of the magnetic resonance system comprises:
calculating the first position information by using a positioning signal transmitted by a first positioning device and received by a second positioning device;
the first positioning device is arranged on the local coil, the local coil is fixedly arranged on a part to be scanned of an imaging object, and the imaging object is fixedly arranged on a patient bed of the magnetic resonance system.
3. The method of claim 2, wherein the second positioning device comprises a processing unit pre-stored with second position information and third position information, the second position information being relative position information between the patient bed and the imaging space, the third position information being relative position information between the patient bed and the second positioning device; the calculating the first position information by using the positioning signal transmitted by the first positioning device and received by the second positioning device includes:
acquiring the relative distance between the first positioning device and the second positioning device, and calculating fourth position information according to the third position information; the fourth position information is position information of the local coil on the patient bed;
and calculating the first position information according to the second position information and the fourth position information.
4. The method according to any one of claims 1-3, wherein the receiving selects the token on the operator interface to receive a plurality of tokens; moving the local coil corresponding to the selected marker into the imaging space according to the first position information, including:
and sequentially moving the local coil corresponding to each selected mark into the imaging space according to the first position information and a set scanning sequence.
5. The method of claim 4, wherein the set scanning order is an order of selecting a plurality of the marks on the operation interface.
6. The method of claim 5, further comprising:
generating a scanning sequence according to a preset mode, and displaying the scanning sequence on the operation interface;
acquiring a selected scanning sequence;
and sequentially moving the corresponding local coils to the imaging space according to the selected scanning sequence.
7. The method of claim 5, further comprising:
obtaining a ranking of the selected plurality of markers;
and sequentially moving the corresponding local coils to the imaging space according to the sequence.
8. The method of claim 4, wherein the set scan order is a priority order of scan operations by the local coils.
9. A magnetic resonance system, comprising:
a scanning apparatus comprising a main magnet and a patient couch, the main magnet for generating a main magnetic field;
a local coil movable with the patient bed;
the first positioning device is fixedly arranged on the local coil;
the second positioning device is matched with the first positioning device to acquire first position information between the local coil and an imaging space in the main magnetic field; the first position information comprises a distance value between the local coil and an imaging space in the magnetic resonance system or coordinate information of the local coil and the magnetic resonance imaging space relative to a same reference;
the main control device is connected with the second positioning device and used for generating a mark of the local coil according to the first position information;
the display device is connected with the main control device and is used for displaying the mark;
the selection device is connected with the display device and is used for selecting the mark displayed by the display device;
wherein the main control device controls the patient bed to move according to the mark selected by the selection device on the display device so as to move the local coil corresponding to the mark to the imaging space.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 8.
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